\begin{table}%t1
\caption{\label{table:obsrun}XMMU J054134.7-682550 observing runs. The table lists  the initial time of the exposure, the exposure time, and the number of source counts. In the case of  XMM-Newton, the number of counts is the sum obtained for both EPIC-MOS~detectors.}
%\centering
\small
\begin{tabular}{c | c c r | c c r }
\hline\hline
Observation & XMM-Newton      &                &                          & RXTE                 &                &                          \\
            & Start           & Exposure (ks)  & Counts                   & Start                & Exposure (ks)  & Counts      \\
\hline
1 & 2007-07-06T23:32:48 & 10.4                 &    15~241                 &  --                   &                &            \\
2 & 2007-08-21T15:12:12 & 7.5                  &    33~184                 & 2007-08-21T19:07:28  & 3.5            &  192~650          \\
3 & 2007-10-05T23:50:15 & 17.0                 &    22~576                 & 2007-10-05T21:57:52  & 1.6            &  24~537          \\
4 & 2007-11-24T22:06:15 & 19.3                 &    4332                  & --                    &                &            \\
\hline
\end{tabular}
\end{table}